Anybody run or ran a F350 dually 6.2 with 4.30 gears.

 

What are you looking to find out?

I occasionally operate a 2021 6.2 XL DRW with 4.30 gearing. Its not my truck but a friends that I work for. In summary its the same as the SRW but with two extra wheels and better stability.

 

What kinda RPM they run at 70-75 no load just truck with the 6 speed tranny. Im looking to change out my 3.73’s for 4.30’s

 

Unfortunately I cant comment on those speeds. I operate between 60-65mph.

At 65mph my 2013 turns 2000ish RPM. Im running 275/70R18 tires 33.5"
At 65mph the 2021 (10R140) turns roughly 2100RPM with 245/75R17 tires 31.5"

 

I'm at 2200 RPM around 75mph. I do have a SRW with slightly larger tires than your dually though...so yours might be 50-100rpm higher

 

Just what I was looking for. Thanks

 

The base XL 2011-16 f250/350, and base xl 350 17+ have the same tire sizes as the drw and gear/transmission options you are looking for.

If a 10 speed the 7.3 250/350 could also have similar gearing and tires.

If its a 10 speed my stock drw 3.55 is at 2000 at 82mpg. Would be at 2097rpm if it has 3.73. You can do the math to figure it from there.

 

Was looking for actual setup because someone had told me to check on the RPM at highway speed with the 6 speed thinking it would be ridiculous high. I also want to do it for bigger tires as well.